Blow-By Racing

 

BBR Short Blocks are high performance Street & Strip engines. They provide an excellent level of reliability in a race environment.

BBR Short Blocks Include:

SPECIFICATIONS:
Block: Production Ford 5.0 Iron Hyd Roller Cam ready 1-Piece Rear Main Seal
Crankshaft: Nodular Iron Large Fillet (Prepped production crankshaft for 306)
Connecting Rods: Forged Polished I-Beams
Rod Bolts: 3/8" ARP 8740 Wav-Loc
Bearings:
-Cam: Seamless Tri-Metal
-Rod: Tri-Metal Main: Tri-Metal
Pistons: Forged pistons CNC double flycut Valve Relief: Inline and Twisted Wedge Compression Ratio: See chart Compression Chart
Wrist pins: Full-Floating .912" Steel
Rings: 1.5mm/1.5mm Moly 4mm SS50U Oil low drag ring package

Notes:
* Components rated at 550 Horsepower
* Fits most aftermarket cylinder heads br>

Compression Ratio
306
58.0cc --- (-3)10.00-(-13)8.87-(+6)11.34
61.0cc --- (-3)9.63 -(-13)8.59-(+6)10.85
64.0cc --- (-3)9.29 -(-13)8.32-(+6)10.41

331
58.0cc --- (-3)10.75-(-13)9.53-(-18)9.03
61.0cc --- (-3)10.35-(-13)9.22-(-18)8.75
64.0cc --- (-3)9.98 -(-13)9.03-(-18)8.58

347
58.0cc --- (-3)11.20-(-18)9.40-(+6)12.72
61.0cc --- (-3)10.78-(-13)9.11-(+6)12.17
64.0cc --- (-3)10.39-(-13)8.84 -(+6)11.66